Precision Audio and AV Interface Products

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TX-VCR Video Controlled Relay - BNC

  • Detect Video Presence
  • Detect Loss of Video
  • Bridging or Terminated Operation
  • Detection of NTSC or PAL Signals
  • Dry-Contact Outputs
  • Operation from AC or DC Power
  • Overview
  • Specifications
  • Related Products
  • Accessories
  • Downloads
  • How to Buy
  • Product Series
  • Dimensions

The TX-VCR is the ideal choice in installations where a control signal is needed based on the absence or presence of valid video signals. The unique power supply input allows the TX-VCR to be powered from a wide variety of existing ac or dc power sources

The TX-VCR has one video INPUT and a LOOP OUT video jack. The detection circuit bridges a 1V video line. The TX-VCR may be inserted in a video line with the loop-through video output feeding a terminated load. It may alternatively be installed at the end of a video line by installing a 75 Ω terminator to the LOOP OUT video jack. The terminator is supplied with the TX-VCR.

Video detection is based on valid sync signals. The TX-VCR responds to valid NTSC or PAL sync while ignoring 50 Hz and 60 Hz hum and related induction artifacts. The TX-VCR is able to detect signals as weak as 0.5 V p-p. When a valid signal is detected, the relay contacts close. Both a normally-open and normally-closed contact are provided, permitting the module to be connected as a video-present detector or as a video-loss detector. The front-panel SYNC LED lights when valid video is being detected.

If a local or remote loss of video audible alert is needed, the TX-VCR may be wired to an RDL BZR.

Input:
BNC, ground-referenced
Input Level:
0.5 V p-p video to 1 V p-p video
Output:
LOOP OUT, BNC, ground-referenced (Output must be terminated with 75 Ω connected load or with 75 Ω terminator supplied)
Control Output:
N/O or N/C relay contacts
Ambient Operating Environment:
0° C to 55° C
Relay Contacts:
Single-pole/double-throw
Maximum Switching Power:
60 W (220 Vdc, 125 Vac, 2A)
Power Requirement:
GROUND-REFERENCED, 12 to 33 Vdc or 12 to 24 Vac, @ 75 mA
Dimensions:
Height: 1.4 in 3.6 cm; Length: 3.0 in 7.6 cm; Width: 1.2 in 3.0 cm
Package Type:
Cardboard Box
Package Dimensions:
2 x 2 x 4 in.
Shipping Weight:
0.325 lbs.
WEEE weight:
0.24 lbs.
Tariff code:
8543.70.9860

Documents:
Format
PDF
CAD Files:
Format
High Res Images:
Format
Declaration of Conformity:
Format
PDF

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TX SERIES

TX Series modules are application-specific modules for the A/V and related industries. Many TX modules offer galvanic transformer isolation. Module functions include signal detection, switching, amplification, format conversion, line driving, mixing, distribution, twisted-pair sending/receiving and more. Each TX is a compact module engineered to provide higher performance and longer life than other industry products. TX modules are solid encapsulated hybrid circuits in durable industrial black plastic/steel or aluminum enclosures with clear bold white lettering for the jacks, terminal block connections, trimming controls and switches.

TX modules are constructed in two widths and heights. All TXs are the same length, have the same mounting hole configuration, and are compatible with all TX series mounting options. A complete range of mounting options is available for systems utilizing multiple TX modules. A single TX module may be mounted right where its function is needed, and are widely used in system designs with OEM or other RDL products. TX SERIES modules are designed and manufactured in the U.S.A.

TX-VCR TX-VCR